Terminals, communication methods, base stations, and wireless communication systems

Abstract

This terminal comprises: a control unit that determines, from among channel state information (CSI) reports in the respective ones of a plurality of cells, a to-be-transmitted CSI report on the basis of the order of applying carrier switching to be applied to channels carrying uplink control information and that determines a cell in which the determined CSI report is to be transmitted; and a transmission unit that transmits the determined CSI report in the determined cell.

Description

Technical Field

[0001] The present invention relates to Terminals, communication methods, base stations, and wireless communication systems .

Background Art

[0002] In 3GPP (registered trademark) (3rd Generation Partnership Project), in order to achieve further increase in system capacity, further increase in data transmission speed, further reduction in latency in a radio section, etc., a radio communication method called 5G or NR (New Radio) (hereinafter, this radio communication method is referred to as "NR") is being studied. In 5G, in order to satisfy the requirement of achieving a throughput of 10 Gbps or more and reducing the latency of a radio section to 1 ms or less, various radio technologies and network architectures are being studied (for example, Non-Patent Document 1).

[0003] Furthermore, in 3GPP standardization, regarding the extension of URLLC (Ultra-Reliable and Low Latency Communications) technology, PUCCH (Physical Uplink Control Channel) carrier switching is being studied. PUCCH carrier switching is being studied as a method for reducing the latency of HARQ-ACK (Hybrid Automatic Repeat reQuest-ACKnowledgement) feedback in the TDD (Time Division Duplex) system (for example, Non-Patent Document 2).

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

[0005] For example, if Channel State Information (CSI) reporting is configured in multiple PUCCH cells, it is necessary to determine which of the multiple CSI reports to send and how to send it from which PUCCH cell, depending on the settings related to PUCCH carrier switching.

[0006] This invention has been made in view of the above points, and aims to clarify the procedure for reporting CSI (Channel State Information) in a wireless communication system. [Means for solving the problem]

[0007] According to the disclosure technology, The terminal comprises a control unit that determines a first cell to which the CSI (Channel State Information) report will be sent based on a carrier switching cell timing pattern applied to a PUCCH (Physical Uplink Control Channel) for sending a CSI report, and a transmission unit that sends the CSI report in the first cell, wherein the control unit does not send the PUCCH in the second cell if a PUCCH for sending the CSI report is set in the second cell and the first cell and the second cell are different. It will be provided. [Effects of the Invention]

[0008] According to the disclosed technology, the procedure for reporting CSI (Channel State Information) in a wireless communication system can be clarified. [Brief explanation of the drawing]

[0009] [Figure 1] This figure illustrates an example (1) of a wireless communication system in an embodiment of the present invention. [Figure 2] This figure illustrates an example (2) of a wireless communication system in an embodiment of the present invention. [Figure 3] This figure shows an example of PUCCH carrier switching (1). [Figure 4] This figure shows an example of PUCCH carrier switching (2). [Figure 5] It is a flowchart showing an example (1) of CSI reporting in an embodiment of the present invention. [Figure 6] It is a diagram showing an example (2) of CSI reporting in an embodiment of the present invention. [Figure 7] It is a flowchart showing an example (3) of CSI reporting in an embodiment of the present invention. [Figure 8] It is a diagram showing an example (4) of CSI reporting in an embodiment of the present invention. [Figure 9] It is a diagram showing an example (5) of CSI reporting in an embodiment of the present invention. [Figure 10] It is a diagram showing an example (6) of CSI reporting in an embodiment of the present invention. [Figure 11] It is a diagram showing an example (7) of CSI reporting in an embodiment of the present invention. [Figure 12] It is a flowchart showing an example (8) of CSI reporting in an embodiment of the present invention. [Figure 13] It is a flowchart showing an example (9) of CSI reporting in an embodiment of the present invention. [Figure 14] It is a diagram showing an example of the functional configuration of the base station 10 in an embodiment of the present invention. [Figure 15] It is a diagram showing an example of the functional configuration of the terminal 20 in an embodiment of the present invention. [Figure 16] It is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 in an embodiment of the present invention. [Figure 17] It is a diagram showing an example of the configuration of the vehicle 2001 in an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies may be used as appropriate. The existing technologies include, for example, existing NR or LTE, but are not limited to existing NR or LTE.

[0012] FIG. 1 is a diagram for explaining an example (1) of a wireless communication system according to an embodiment of the present invention. As shown in FIG. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example, and there may be a plurality of each.

[0013] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Also, the TTI (Transmission Time Interval) in the time domain may be a slot or a subframe.

[0014] The base station 10 can perform carrier aggregation in which a plurality of cells (a plurality of CCs (Component Carriers)) are bundled to communicate with the terminal 20. In carrier aggregation, one PCell (Primary Cell) and one or more SCells (Secondary Cells) are used.

[0015] The base station 10 transmits synchronization signals and system information to the terminal 20. Synchronization signals include, for example, NR-PSS and NR-SSS. System information is transmitted via, for example, NR-PBCH or PDSCH, and is also called broadcast information. As shown in Figure 1, the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Here, signals transmitted via control channels such as PUCCH and PDCCH are called control signals, and signals transmitted via shared channels such as PUSCH and PDSCH are called data, but this is just one example of terminology.

[0016] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 may also be referred to as UE, and base station 10 as gNB.

[0017] Figure 2 is a diagram illustrating an example (2) of a wireless communication system in an embodiment of the present invention. Figure 2 shows an example configuration of a wireless communication system when dual connectivity (DC) is implemented. As shown in Figure 2, the system is provided with a base station 10A which acts as a master node (MN) and a base station 10B which acts as a secondary node (SN). Base stations 10A and 10B are each connected to the core network 30. Terminal 20 can communicate with both base station 10A and base station 10B.

[0018] The cell group provided by base station 10A, which is the MN (Mobile Network Module), is called the Master Cell Group (MCG), and the cell group provided by base station 10B, which is the SN (Station Network Module), is called the Secondary Cell Group (SCG). In dual connectivity, the MCG consists of one PCell and zero or more SCells, and the SCG consists of one PSCell (Primary SCG Cell) and zero or more SCells.

[0019] Dual connectivity may also be a communication method that utilizes two communication standards, and any combination of communication standards is acceptable. For example, the combination could be NR and 6G standards, or LTE and 6G standards. Furthermore, dual connectivity may also be a communication method that utilizes three or more communication standards, and may be referred to by a different name than dual connectivity.

[0020] The processing operations in this embodiment may be performed using the system configuration shown in Figure 1, the system configuration shown in Figure 2, or any other system configuration.

[0021] In 3GPP standardization, support for enhanced IoT (Internet of Things) and URLLC (Ultra-reliable and low latency communication) in NR is being considered. Furthermore, to meet URLLC requirements, enhanced HARQ-ACK feedback is being considered.

[0022] Figure 3 shows an example of PUCCH carrier switching (1). PUCCH carrier switching is being considered for HARQ feedback. As shown in Figure 3, in cell 1 where PUCCH is transmitted, when the HARQ-ACK corresponding to the PDSCH at timing T1 is transmitted with a PUCCH at timing T2 which is less than the K1 value, the timing T2 in cell 1 is DL and therefore transmission is not possible, and at timing T3 when cell 1 becomes UL, the K1 value is exceeded. Therefore, PUCCH is transmitted in cell 2 where timing T2 is UL. Note that the K1 value may be a parameter indicating the timing from PDSCH to HARQ feedback.

[0023] For example, intra-UE multiplexing of UCI (Uplink Control Information) including HARQ-ACK may be performed before UL channel cancellation resulting from collisions with semistatic DL symbols, SSB (SS / PBCH block) symbols, and SFI (Slot Format Indication).

[0024] Here, when PUCCH carrier switching is supported based on a semi-static configuration and terminal 20 determines the PUCCH carrier based on a predetermined rule that is conditional on a collision with an invalid symbol, the execution order of PUCCH carrier switching and UE in-multiplexing may affect the UL transmission result.

[0025] Figure 4 shows an example of PUCCH carrier switching (2). If UE multiplexing is performed before PUCCH carrier switching, in the example in Figure 4, a HARQ-ACK is sent in the DG (Dynamic grant)-PUSCH of the PUSCH cell. On the other hand, if PUCCH carrier switching is performed before UE multiplexing, in the example in Figure 4, it is determined that a HARQ-ACK is sent in the PUCCH of the PUCCH candidate cell, and further, due to UE multiplexing, a HARQ-ACK is sent in the CG (Configured grant)-PUSCH of the PUSCH cell.

[0026] With regard to PUCCH carrier switching, the methods shown in Method 1) to Method 3) below may be applied.

[0027] Method 1) Perform PUCCH carrier switching based on dynamic notifications from DCI. Hereinafter, this PUCCH carrier switching will also be referred to as dynamic PUCCH carrier switching. Method 2) Perform PUCCH carrier switching based on a predetermined semi-static rule. Hereinafter, this PUCCH carrier switching will also be referred to as semi-static PUCCH carrier switching. Method 3) Perform PUCCH carrier switching based on the PUCCH cell timing pattern set by the RRC in the applicable PUCCH cell.

[0028] Method 1 and Method 2 above may be performed, or Method 1 and Method 3 above may be performed.

[0029] Furthermore, PUCCH carrier switching may be configured for each UL-BWP (Bandwidth Part). That is, PUCCH carrier switching may be configured for each UL-BWP in a candidate cell. For example, PUCCH carrier switching may be configured using the information elements pucch-Config / PUCCH-ConfigurationList.

[0030] Furthermore, if the information element multi-CSI-PUCCH-ResourceList is not set, or if the PUCCH resources for sending CSI reports do not overlap within the slot, the UE may send up to two non-overlapping CSI reports in that slot, and may use at least one PUCCH format 2. Note that the information element multi-CSI-PUCCH-ResourceList may be information indicating a list of PUCCH resources for sending CSI reports.

[0031] Furthermore, if the information element multi-CSI-PUCCH-ResourceList is set and multiple PUCCH resources overlap, the UE may multiplex all CSI reports on a resource selected from the group of resources specified by multi-CSI-PUCCH-ResourceList. In other words, the UE may multiplex all CSI reports on the PUCCH of one of the CSIs in that slot.

[0032] In cases where CSI reporting is configured in multiple PUCCH cells, the method for sending CSI reports needs to be clarified in more detail, for example, regarding the points shown in 1)-3) below.

[0033] 1) Whether or not semi-static PUCCH carrier switching is configured. 2) Whether or not PUCCH reports that make multiple CSI reports in different cells overlap. 3) Whether or not to duplicate PUCCH to report CSI in different cells.

[0034] The following describes the case where CSI reporting is configured in multiple PUCCH cells and PUCCH carrier switching is configured.

[0035] Figure 5 is a flowchart showing an example (1) of a CSI report in an embodiment of the present invention. In step S11, terminal 20 sets up CSI reports in multiple PUCCH cells and sets up semi-static PUCCH carrier switching. In the following step S12, terminal 20 applies a PUCCH cell pattern to determine which cells to send the CSI reports to. In the following step S13, terminal 20 decides which CSI reports to send. That is, the PUCCH cell pattern may be applied first to determine which CSI reports to send. Note that "not sent" and "dropped" may be substituted for each other below.

[0036] For example, if a PUCCH is set to send a CSI report to a certain cell, and the target PUCCH cell mapped to the CSI report timing is different from that cell, the PUCCH that sends the CSI report may not be sent, or it may be dropped. Note that the target PUCCH cell may be the cell that actually sends the PUCCH.

[0037] For example, if a PUCCH is configured to send a CSI report to a certain cell, and the target PUCCH cell mapped to the CSI report timing is the same as that cell, then the PUCCH sending the CSI report may be sent.

[0038] For example, if there are multiple CSI reports in a target PUCCH cell notified by a PUCCH cell pattern, the rules from 3GPP Release 15 / 16 may be reused to determine which PUCCH is reporting the CSI in that cell.

[0039] For example, if the start and end timings of a PUCCH that issues a CSI report are mapped to a different cell than the target PUCCH cell based on the PUCCH cell pattern, terminal 20 does not need to consider this as an error case, nor does it need to send or drop the CSI report.

[0040] Figure 6 shows an example (2) of a CSI report in an embodiment of the present invention. As shown in Figure 6, in a slot where cell #2 is specified by the PUCCH cell pattern, CSI reports #1, #2, and #4 set in cell #1 do not have to be sent or may be dropped. In a slot where cell #2 is specified by the PUCCH cell pattern, CSI report #3 set in cell #2 may be sent.

[0041] Furthermore, as shown in Figure 6, in a slot where cell #1 is specified by the PUCCH cell pattern, CSI report #5 set in cell #2 does not have to be sent, or may be dropped. In a slot where cell #1 is specified by the PUCCH cell pattern, CSI report #5 set in cell #1 may be sent.

[0042] Figure 7 is a flowchart showing an example (3) of a CSI report in an embodiment of the present invention. In step S21, terminal 20 sets up CSI reports in multiple PUCCH cells and sets up semi-static PUCCH carrier switching. In the following step S22, terminal 20 multiplexes the CSI reports of multiple cells over a predetermined period. This predetermined period may be, for example, one slot. In the following step S23, terminal 20 applies a PUCCH cell pattern to determine which cells will transmit the CSI reports. That is, terminal 20 may first multiplex the CSI reports of different cells over a predetermined period, and then apply a PUCCH cell pattern to determine which cells will transmit the multiplexed CSI reports.

[0043] The PUCCH resource that sends multiplexed CSI reports may be selected from the multi-CSI-PUCCH-ResourceList. For example, terminal 20 does not need to consider the case where the multi-CSI-PUCCH-ResourceList is not set in the target PUCCH cell. Furthermore, terminal 20 may simultaneously send multiplexed CSI reports from its own cell and other cells in the target PUCCH cell.

[0044] For example, if the multi-CSI-PUCCH-ResourceList is not set in the target PUCCH cell, terminal 20 does not need to send or drop CSI reports from other cells in the target PUCCH cell without performing multiplexing.

[0045] Target PUCCH cells may be mapped to the current predetermined period. For example, terminal 20 does not need to assume that multiple target PUCCH cells are mapped to the current predetermined period. Furthermore, it does not need to simultaneously assume that CSI reports are set for two or more of the target PUCCH cells during the current predetermined period.

[0046] For example, if multiple target PUCCH cells are mapped to a predetermined period, the first or last target PUCCH cell may be mapped to the predetermined period, the target PUCCH cell with the smallest or largest cell index may be mapped to the predetermined period, or the target PUCCH cell to which the smallest or largest SCS is applied may be mapped to the predetermined period.

[0047] Furthermore, in order to determine the target PUCCH cell, terminal 20 does not need to assume that multiple target PUCCH cells will be mapped during the current predetermined period. Moreover, it does not need to simultaneously assume that CSI reports will be set for two or more of the target PUCCH cells during the current predetermined period.

[0048] Furthermore, in order to determine the target PUCCH cell, if multiple target PUCCH cells are mapped to the current predetermined period, the first or last target PUCCH cell may be mapped to the current predetermined period, the target PUCCH cell with the minimum or maximum cell index may be mapped to the current predetermined period, or the target PUCCH cell to which the minimum or maximum SCS is applied may be mapped to the current predetermined period.

[0049] The PUCCH resource that sends the multiplexed CSI report may be selected from the multi-CSI-PUCCH-ResourceList configured in the target PUCCH cell notified by the PUCCH cell pattern.

[0050] For example, the method for sending CSI reports described in Figure 6 may only be applied if a CSI report exists in the target PUCCH cell. If no CSI report exists in the target PUCCH cell, CSI reports from cells other than the target PUCCH cell may not be sent or may be dropped.

[0051] For example, the method for sending CSI reports described in Figure 6 may only be applicable if a multi-CSI-PUCCH-ResourceList is set for the target PUCCH cell.

[0052] Figure 8 shows an example (4) of a CSI report in an embodiment of the present invention. As shown in Figure 8, CSI reports #1, #2 and #3 are multiplexed and transmitted in cell #2, which is the target PUCCH cell. CSI report #4 is also transmitted in cell #2, which is the target PUCCH cell. CSI reports #5 and #6 are also multiplexed and transmitted in cell #1, which is the target PUCCH cell.

[0053] Figure 9 shows an example (5) of a CSI report in an embodiment of the present invention. Figure 9 shows an example where multi-CSI-PUCCH-ResourceList is set in cell #1 but not in cell #2. As shown in Figure 9, since multi-CSI-PUCCH-ResourceList is not set in cell #2, which is the target PUCCH cell, CSI reports #1 and #2 are not sent, and only CSI report #3 is sent. Also, since multi-CSI-PUCCH-ResourceList is not set in cell #2, which is the target PUCCH cell, CSI report #4 is not sent. Also, since multi-CSI-PUCCH-ResourceList is set in cell #1, which is the target PUCCH cell, CSI reports #5 and #6 are multiplexed and sent in cell #1.

[0054] Figure 10 shows an example (6) of a CSI report in an embodiment of the present invention. In Figure 10, the method described in Figure 7 is applied only if a CSI report exists in the target PUCCH cell during a predetermined period, and if no CSI report exists in the target PUCCH cell during the predetermined period, CSI reports from other cells do not need to be transmitted. For example, if a CSI report exists in the target PUCCH cell during a predetermined period, the CSI reports from other cells and the CSI report of the own cell may be multiplexed and transmitted.

[0055] As shown in Figure 9, since CSI report #3 exists in cell #2, which is the target PUCCH cell, CSI reports #1, #2, and #3 are multiplexed and sent from cell #2. Also, since there is no CSI report in cell #2, which is the target PUCCH cell, CSI report #4 is not sent. Since CSI report #5 exists in cell #1, which is the target PUCCH cell, CSI reports #5 and #6 are multiplexed and sent from cell #1.

[0056] Here, the predetermined period may be the period of one slot in the reference cell, or the period of a slot group. For example, the reference cell or the predetermined period may be determined as shown in 1)-5) below.

[0057] 1) The reference cell may be the cell used to define the PUCCH cell pattern. 2) The predetermined time may be a fixed absolute period (e.g., 1 ms) defined by RRC signaling or specifications. 3) The reference cell may be a default cell such as PCell, PSCell, or PUCCH-SCell. 4) The reference cell may be a cell set by RRC signaling. 5) Of all PUCCH cells or all PUCCH cells for which a CSI report is set by PUCCH, the reference cell may be the cell to which the maximum or minimum SCS applies, or the cell with the maximum or minimum cell index.

[0058] The following describes the case where CSI reporting is configured in multiple PUCCH cells and PUCCH carrier switching is not configured.

[0059] Terminal 20 does not need to consider the case where CSI reporting is configured in multiple PUCCH cells and PUCCH carrier switching is not configured as an error case.

[0060] Furthermore, if terminal 20 has configured CSI reporting in multiple PUCCH cells and PUCCH carrier switching is not configured, the multiple CSI reports may be transmitted in only one PUCCH cell within a predetermined period.

[0061] For example, terminal 20 does not need to anticipate that multiple CSI reports will be configured within a given period. The configuration of multiple CSI reports within a given period may be avoided by configuring appropriate CSI reports in different PUCCH cells. The method for PUCCHs transmitting CSI reports in 3GPP Release 15 / 16 may be reused.

[0062] For example, it may be permissible for multiple CSI reports to be set within a predetermined period. For instance, if terminal 20 has multiple CSI reports set within a predetermined period, it may send only one of the CSI reports and not send the others.

[0063] Furthermore, for example, if multiple CSI reports are set within a predetermined period, terminal 20 may multiplex multiple CSI reports and send them in a single cell. For example, terminal 20 may assume that multi-CSI-PUCCH-ResourceList is set in at least one of the multiple PUCCH cells in which CSI reports are set. Also, if multi-CSI-PUCCH-ResourceList is not set in any of the multiple PUCCH cells in which CSI reports are set, terminal 20 does not have to send all CSI reports, or it may send one of the CSI reports and not the others.

[0064] Furthermore, for example, if terminal 20 has multiple CSI reports set up within a predetermined period, the multiple CSI reports may be transmitted using two or more PUCCH cells.

[0065] Figure 11 shows an example (7) of a CSI report in an embodiment of the present invention. As shown in Figure 11, for example, terminal 20 does not need to assume that in a given slot, cell #1 has CSI reports #1 and #2, and cell #2 has CSI report #3. Also, for example, if cell #1 has CSI reports #1 and #2, and cell #2 has CSI report #3, terminal 20 may decide that one of the cells will be the cell to which the PUCCH of the CSI report will be sent. Also, for example, if cell #1 has CSI reports #1 and #2, and cell #2 has CSI report #3, terminal 20 may send the CSI report via PUCCH in multiple cells, or for example, send the CSI report via PUCCH in 3 cells, or send the CSI report in some of the PUCCH cells.

[0066] Figure 12 is a flowchart showing an example (8) of CSI reporting in an embodiment of the present invention. In step S31, terminal 20 sets up CSI reporting for multiple PUCCH cells and does not set up semi-static PUCCH carrier switching. In the subsequent step S32, terminal 20 transmits only the CSI report for one PUCCH cell out of the multiple PUCCH cell CSI reports for a predetermined period, and does not transmit the remaining CSI reports.

[0067] Figure 13 is a flowchart of an example (9) of a CSI report in an embodiment of the present invention. In step S41, terminal 20 sets up CSI reports in multiple PUCCH cells and does not set up semi-static PUCCH carrier switching. In the subsequent step S42, terminal 20 multiplexes the CSI reports of multiple PUCCH cells over a predetermined period and transmits the multiplexed CSI report in one PUCCH cell.

[0068] If terminal 20 has CSI reporting configured in multiple PUCCH cells and PUCCH carrier switching is not configured, then within a predetermined period, CSI reporting may be transmitted from only one PUCCH cell, and CSI reporting from other PUCCH cells may not be transmitted. Furthermore, the following actions may be performed.

[0069] When a PUCCH cell is determined to send a PUCCH for a CSI report, the rules of 3GPP Release 15 / 16 may be reused to determine which CSI report to send and which PUCCH resource to use in that PUCCH cell.

[0070] The PUCCH cells that will submit CSI reports may be determined as shown in Alt1) and Alt2) below.

[0071] Alt1) Decision based on CSI report You may select the prescribed CSI report shown in Alt1-1) and Alt1-1A)-Alt1-1F). Alt1-1A) The CSI report with the highest priority among multiple CSI reports within a specified period. This priority may be determined by reusing the rules of 3GPP Release 15 / 16, or by new rules based on the PUCCH cell index. Alt1-1B) Among the CSI reports in multiple cells within a specified period, any CSI report whose start or end position is at the beginning or end, respectively. Alt1-1C) CSI report with the longest or shortest PUCCH length among multiple CSI reports within a specified period. Alt1-1D) CSI reports from multiple cells within a specified period that have the longest or shortest CSI reporting cycle. Alt1-1E) CSI reports from multiple cells within a specified period that have a specific size and / or specific PUCCH format. Alt1-1F) CSI reports with the largest or smallest UCI payload size among multiple CSI reports within a specified period.

[0072] Alt2) Determined based on the cell's attributes or settings. Alt2-1) CSI reports for the cells with the highest or lowest SCS and / or the lowest or highest cell index among multiple PUCCH cells for which CSI reports exist within a specified period. Alt2-2) CSI reports for PCell, PSCell, or PUCCH-SCell among multiple PUCCH cells for which CSI reports exist within a specified period. If none of the multiple cells include PCell, PSCell, or PUCCH-SCell, Alt1), Alt2-1), Alt2-3), Alt2-4), or Alt2-5) may be applied, or not all CSI reports may be sent. PCell, PSCell, or PUCCH-SCell may be replaced with other cells, such as cells set by RRC signaling.

[0073] Alt2-3) CSI reports from PUCCH cells that have been dynamically notified of PUCCH transmission, among multiple PUCCH cells that have CSI reports within a specified period. For example, CSI reports from target PUCCH cells that report HARQ-ACK associated with DCI. Alt2-3A) In multiple PUCCH cells where CSI reports exist within a predetermined period, terminal 20 does not need to assume PUCCH cells that have been dynamically notified of PUCCH transmissions. Furthermore, terminal 20 does not need to assume CSI reports in multiple PUCCH cells that have been dynamically notified of PUCCH transmissions. Alt2-3B) Among multiple PUCCH cells for which CSI reports exist within a specified period, if there are multiple PUCCH cells that have been dynamically notified of PUCCH transmission, the CSI report in the PUCCH cell that is the first or last to transmit a PUCCH, or the PUCCH cell with the smallest or largest cell index, or the PUCCH cell with the smallest or largest SCS. Alt2-3C) If no CSI report exists for a PUCCH cell that has been dynamically notified of a PUCCH transmission within a specified period, Alt1), Alt2-2), Alt2-4), Alt2-5) may be applied, or it may be not necessary to send any CSI reports.

[0074] Alt2-4) Among multiple PUCCH cells that have CSI reports within a specified period, the cell with the multi-CSI-PUCCH-ResourceList set. If there are no PUCCH cells with the multi-CSI-PUCCH-ResourceList set, Alt1), Alt2-2), Alt2-3), and Alt2-5) may be applied, or not all CSI reports may be sent. Also, among multiple PUCCH cells that have CSI reports within a specified period, if there are multiple cells with the multi-CSI-PUCCH-ResourceList set, Alt1), Alt2-2), Alt2-3), and Alt2-5) may be applied to select one PUCCH cell, or not all CSI reports may be sent.

[0075] Alt2-5) A list may be set up that defines the order in which PUCCH cells that report CSIs using RRC signaling will be sent, and based on this order, one PUCCH cell that will send a CSI report may be selected from among multiple PUCCH cells that have sent CSI reports within a predetermined period.

[0076] If terminal 20 has multiple CSI reports configured in multiple PUCCH cells and PUCCH carrier switching is not configured, it may multiplex multiple CSI reports within a predetermined period into a single CSI report and transmit it using one PUCCH cell. Furthermore, the following operations may be performed.

[0077] Operation 1) The PUCCH cell that transmits the multiplexed CSI report may be determined based on Alt1), Alt2-1), Alt2-2), Alt2-3), Alt2-4), or Alt2-5). Alternatively, a PUCCH cell with multiple CSI reports set within a predetermined period may be replaced with a PUCCH cell with a CSI report already set. Furthermore, even if no CSI reports exist in a cell configured by PCell, PSCell, PUCCH-SCell, or RRC signaling within a predetermined period, terminal 20 may transmit a multiplexed CSI report in a cell configured by PCell, PSCell, PUCCH-SCell, or RRC signaling.

[0078] Case 1-1) After determining which PUCCH cell will send the multiplexed CSI report, if the multi-CSI-PUCCH-ResourceList is set for that PUCCH cell, the multiplexed CSI report may be sent from that PUCCH cell. Case 1-2) After determining which PUCCH cell will send the multiplexed CSI report, if the multi-CSI-PUCCH-ResourceList is not set for that PUCCH cell, it may be treated as an error case, or it may be not possible to send all CSI reports within the specified period, or it may be possible to fall back to sending the CSI report of the one PUCCH cell determined by the method described above from among the CSI reports within the specified period, and not sending the CSI reports of the other PUCCH cells.

[0079] Action 2) The cells to which CSI reports should be sent may be determined by considering the multi-CSI-PUCCH-ResourceList.

[0080] Case 2-1) If the multi-CSI-PUCCH-ResourceList is set for only one of the multiple PUCCH cells in which CSI reports are configured within a specified period, the multiplexed CSI report may be sent from that cell.

[0081] Case 2-2) If, among multiple PUCCH cells for which CSI reports have been set within a specified period, the multi-CSI-PUCCH-ResourceList is not set for any of the cells, it is not necessary to send all CSI reports, or the system may fall back to sending the CSI report for one PUCCH cell determined by the method described above, and not sending the CSI reports for the other PUCCH cells.

[0082] Case 2-3) If a multi-CSI-PUCCH-ResourceList is set for multiple PUCCH cells among which CSI reports are set within a predetermined period, the cells to which the multiplexed CSI reports are sent may be determined as shown in Operation 1). Furthermore, the CSI reports and PUCCH cells may be limited to PUCCH cells for which the multi-CSI-PUCCH-ResourceList is set.

[0083] In operations 1) and 2), if a PUCCH cell to send the multiplexed CSI report is determined and the multi-CSI-PUCCH-ResourceList is set to the determined PUCCH cell, then multiplexing and transmission may be performed in that PUCCH cell as shown below.

[0084] Terminal 20 may multiplex all CSI reports within a predetermined period, or it may multiplex a number of CSI reports within a predetermined period that does not exceed X. When multiplexing a number of CSI reports within a predetermined period that does not exceed X, the X CSI reports may be determined based on at least one of the following: the priority of the CSI reports, the first or last CSI report at the start or end position, the longest or shortest PUCCH length, the longest or shortest CSI report period, the report size, the PUCCH format, or the maximum or minimum UCI payload size. The value of X may be set by RRC signaling or defined in the specification.

[0085] Terminal 20 does not need to assume that multiple slots transmitting multiplexed CSIs in a PUCCH cell will overlap within a predetermined period. Furthermore, if multiple slots transmitting multiplexed CSIs in a PUCCH cell overlap, terminal 20 may select the first or last slot to transmit within the predetermined period, or select the first or last slot to transmit a CSI report in that cell within the predetermined period, or select the first or last slot that overlaps with the CSI report whose start or end position is the first or last slot, respectively, among the PUCCHs in which all CSIs have been set within the predetermined period, and transmit.

[0086] The PUCCH resource may be selected from the multi-CSI-PUCCH-ResourceList configured in the determined PUCCH cell.

[0087] The following describes the behavior when CSI reports are sent from two or more PUCCH cells within a specified period.

[0088] The limitations relating to CSI reports transmitted in multiple PUCCH cells may be those shown in 1) or 2) below.

[0089] 1) CSI reports may not be subject to additional restrictions. That is, the restrictions on CSI reports in a cell under 3GPP Release 15 / 16 may apply. For example, the restriction under 3GPP Release 15 / 16 is that a maximum of two non-overlapping CSI reports may be submitted in one slot in one cell. Furthermore, if there are two overlapping CSI reports in a slot, at least one CSI report may be submitted in PUCCH format 2.

[0090] 2) CSI reports may be subject to additional limitations. For example, some or all of the limitations set out in limitations 1)-7) below may apply.

[0091] Limitation 1) Up to X (where X is 1 or more) non-overlapping CSI reports may be sent from multiple PUCCH cells within a specified period. Limitation 2) You may transmit CSI reports from up to Y (where Y is 1 or more) PUCCH cells out of the CSI reports transmitted from multiple PUCCH cells within a specified period. Limitation 3) Up to Z (where Z is 1 or more) non-overlapping CSI reports may be sent from a single PUCCH cell within a specified period. Limitation 4) Of the X′ (where X′ is less than or equal to X) CSI reports transmitted in multiple PUCCH cells within a specified period, at least or up to M (where M is between 1 and X′) CSI reports may be transmitted in PUCCH format 2. Limitation 5) Of the Z' (where Z' is less than or equal to Z) CSI reports transmitted in a single PUCCH cell within a specified period, at least or up to N (where N is between 1 and Z') CSI reports may be transmitted in PUCCH format 2 in that PUCCH cell. Limitation 6) Of the X′′ (where X′′ is less than or equal to X) CSI reports transmitted in multiple PUCCH cells within a specified period, at least or up to M′ (where M′ is between 1 and X′′) CSI reports may be transmitted in PUCCH format 3 or 4. Limitation 7) Of the Z'' (where Z'' is less than or equal to Z) CSI reports transmitted in a single PUCCH cell within a specified period, at least or up to N'' (where N'' is between 1 and Z'') CSI reports may be transmitted in PUCCH format 3 or 4 in that PUCCH cell.

[0092] The above values ​​of X, X', X'', Y, Z, Z', Z'', M, M', N, and N' may be defined by the specification or set by RRC signaling. Each value may be defined or set independently or dependently.

[0093] Multiple CSI reports from multiple PUCCH cells may be processed as follows:

[0094] Option 2-1) Terminal 20 may process in two steps: firstly, it may process CSI-PUCCH within a cell, and secondly, it may process CSI-PUCCH between cells. Step 1) Process the CSI-PUCCH for each cell according to the rules of 3GPP Release 15 / 16. Step 2) Process the CSI-PUCCH between cells. For example, if the CSI reports do not overlap, at least two non-overlapping CSI reports will be entered in one nest lot of one PUCCH cell, in PUCCH format 2. Case 1) If CSI reports do not overlap between PUCCH cells within a specified period, each PUCCH cell may send its CSI report separately, and no further restrictions may be applied. Alternatively, if CSI reports do not overlap between PUCCH cells, restrictions 1)-7) described above may be applied to the CSI reports. The processing of CSI reports between cells will be described later. Case 2) If CSI reports overlap between PUCCH cells within a predetermined period, and at least one of the PUCCH cells in question or among the PUCCH cells in which CSI reports are set is configured with multi-CSI-PUCCH-ResourceList, terminal 20 may multiplex the CSI reports between multiple cells into a single CSI report and transmit it in one PUCCH cell using the method described above. Alternatively, if no PUCCH cell is configured with multi-CSI-PUCCH-ResourceList, the inter-cell CSI report processing method described later may be applied.

[0095] Option 2-2) Terminal 20 may process CSI reports between PUCCH cells in a single step. It may assume more than two overlapping or non-overlapping CSI reports in one slot of one PUCCH cell. Case 1) If CSI reports do not overlap within or between PUCCH cells within a specified period, CSI reports may be sent separately in each PUCCH cell, and further restrictions may not be applied. Alternatively, if CSI reports do not overlap between PUCCH cells, restrictions 1) to 7) described above may be applied to the CSI reports. The processing of CSI reports between cells will be described later. Case 2) If CSI reports overlap between PUCCH cells within a predetermined period, and at least one of the PUCCH cells in question or among the PUCCH cells in which CSI reports are set is configured with multi-CSI-PUCCH-ResourceList, terminal 20 may multiplex the CSI reports between multiple cells into a single CSI report and transmit it in one PUCCH cell using the method described above. Alternatively, if no PUCCH cell is configured with multi-CSI-PUCCH-ResourceList, the inter-cell CSI report processing method described later may be applied.

[0096] Processing related to CSI reports between multiple PUCCH cells within a specified period may be carried out as shown in 1)-3) below.

[0097] 1) CSI reports between multiple PUCCH cells within a predetermined period may be processed based on the priority of the CSI reports. For example, steps A) to D) below may be performed. Step A) Let C(i) be the set of CSI reports between cells. Let S(j) be the selected set of CSI reports, and leave it empty. Step B) Select the CSI report with the highest priority among the CSI reports between cells as the first CSI report. Here, C(i) may include CSI reports that are duplicated. If a cell has multiple CSI reports, the duplicated CSI report may be assigned the highest or lowest priority among the duplicated CSI reports, or it may always be assigned the highest or lowest priority. Step C) Remove the first CSI report from C(i) and add it to S(j). Step D) If the maximum number of CSI reports between PUCCH cells has not been exceeded (e.g., due to limitation 1 above), and the maximum number of PUCCH cells has not been exceeded (e.g., due to limitation 2 above), and there are still CSI reports remaining in C(i), then steps D1-D3 below may be looped.

[0098] Step D1) CSI reports that overlap with CSI reports included in S(j), or CSI reports in the same cell as CSI reports included in S(j) by applying limitation 3) above, or CSI reports in a specific PUCCH format by applying limitations 4) 5) 6) 7) above, are excluded from C(i). Step D2) Select the CSI report with the highest priority among the remaining C(i) reports. Step D3) Remove the selected CSI report from C(i) and add it to S(j).

[0099] 2) CSI reports between multiple PUCCH cells within a predetermined period may be processed based on the PUCCH cell order. The PUCCH cell order is the order in which PUCCH cells send CSI reports, as set by RRC signaling. For example, PCell, PSCell, and PUCCH-SCell may be first, SCell#1 second, and so on. For example, steps A) to D) below may be performed. Step A) Let C(i) be the set of CSI reports between cells. Let S(j) be the selected set of CSI reports, and leave it empty. Step B) Select the PUCCH cell with the smallest or largest PUCCH cell index set from the CSI reports between cells. Step C) Remove CSI reports from the selected PUCCH cells from C(i) and add them to S(j). Here, the rules of 3GPP Release 15 / 16 may be applied to determine the CSI reports in the selected PUCCH cells, and the limitation 3) above in Release 17 regarding the number of CSI reports per cell may also be applied. The CSI reports determined in the selected PUCCH cells are added to S(j), and all CSI reports in the selected PUCCH cells may be excluded. Step D) If the maximum number of CSI reports between PUCCH cells has not been exceeded (e.g., due to limitation 1 above), and the maximum number of PUCCH cells has not been exceeded (e.g., due to limitation 2 above), and there are still CSI reports remaining in C(i), then steps D1-D3 below may be looped.

[0100] Step D1) CSI reports that overlap with CSI reports included in S(j), or CSI reports in the same cell as CSI reports included in S(j) by applying limitation 3) above, or CSI reports in a specific PUCCH format by applying limitations 4) 5) 6) 7) above, are excluded from C(i). Step D2) Select the CSI report in the PUCCH cell that has the smallest or largest PUCCH cell index among the remaining C(i). Step D3) Remove the selected CSI reports from C(i) and add them to S(j). Here, the rules of 3GPP Release 15 / 16 may be applied to determine the CSI reports in the selected PUCCH cells, or the limitation 3) above in Release 17 regarding the number of CSI reports per cell may be applied. If the limitation 1) above is not exceeded, the determined CSI reports in the selected PUCCH cells may be added to S(j). If the limitation 1) above is exceeded, the CSI reports with higher priority among the determined CSI reports may be added to S(j) in a manner that does not exceed the limitation 1). Alternatively, all CSIs in the selected PUCCH cells may be removed from C(i).

[0101] 3) CSI reports between multiple PUCCH cells within a predetermined period may be processed based on the priority of the CSI report and the PUCCH cell. For example, steps A) to D) below may be performed. Step A) Let C(i) be the set of CSI reports between cells. Let S(j) be the selected set of CSI reports, and leave it empty. Step B) Select the CSI report with the smallest or largest PUCCH cell order index from among the CSI reports between cells as the first CSI report. Here, C(i) may include CSI reports that are duplicated. If a cell has multiple CSI reports, the duplicated CSI report may be assigned the highest or lowest priority among the duplicated CSI reports, or it may always be assigned the highest or lowest priority. Step C) Remove the first CSI report and the CSI reports in the same cell as the first CSI report from C(i) and add them to S(j). Here, the rules of 3GPP Release 15 / 16 may be applied to determine the CSI reports in the selected PUCCH cell, and the limitation 3) above in Release 17 regarding the number of CSI reports per cell may also be applied. The CSI report determined to be the first CSI report is added to S(j), and all CSI reports in the cell of the first CSI report may be excluded. Step D) If the maximum number of CSI reports between PUCCH cells has not been exceeded (e.g., due to limitation 1 above), and the maximum number of PUCCH cells has not been exceeded (e.g., due to limitation 2 above), and there are still CSI reports remaining in C(i), then steps D1-D3 below may be looped.

[0102] Step D1) CSI reports that overlap with CSI reports included in S(j), or CSI reports in the same cell as CSI reports included in S(j) by applying limitation 3) above, or CSI reports in a specific PUCCH format by applying limitations 4) 5) 6) 7) above, are excluded from C(i). Step D2) Select the CSI report in the PUCCH cell with the highest priority among the remaining C(i) CSI reports. Step D3) Remove the selected CSI reports from C(i) and add them to S(j). Here, the rules of 3GPP Release 15 / 16 may be applied to determine the CSI reports in the selected PUCCH cells, or the limitation 3) above in Release 17 regarding the number of CSI reports per cell may be applied. If the limitation 1) above is not exceeded, the determined CSI reports in the selected PUCCH cells may be added to S(j). If the limitation 1) above is exceeded, the CSI reports with higher priority among the determined CSI reports may be added to S(j) in a manner that does not exceed the limitation 1). Alternatively, all CSIs in the selected PUCCH cells may be removed from C(i).

[0103] Which of the above-mentioned CSI reporting procedures is performed may be set by higher-layer parameters. Furthermore, which of the above-mentioned CSI reporting procedures is performed may be reported as UE capability. Also, which of the above-mentioned CSI reporting procedures is performed may be defined by specifications. Furthermore, which of the above-mentioned CSI reporting procedures is performed may be determined based on settings by higher-layer parameters and UE capability reporting.

[0104] Prioritization for CSIs may be governed by the rules of 3GPP Release 15 / 16, or a new CSI priority system may be introduced that takes the PUCCH cell index into consideration.

[0105] Furthermore, the following UE capabilities 1)-6) may be defined.

[0106] 1) Whether or not it supports semi-static PUCCH carrier switching. 2) Whether or not to support PUCCH settings for CSI reporting in multiple cells. 3) Whether or not to support multiple CSI reports in different cells.

[0107] In the embodiment described above, when terminal 20 transmits multiple CSIs, it is possible to determine which CSI report to transmit based on conditions related to PUCCH carrier switching, conditions related to CSI reporting, etc., and to determine the cell to which the determined CSI report will be transmitted.

[0108] In other words, it becomes possible to clarify the procedure for reporting CSI (Channel State Information) in a wireless communication system.

[0109] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above. The base station 10 and terminal 20 include functions to perform the embodiments described above. However, the base station 10 and terminal 20 may each be equipped with only one of the proposed functions from the embodiments.

[0110] <Base station 10> Figure 14 shows an example of the functional configuration of a base station 10. As shown in Figure 14, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 14 is merely an example. The names of the functional categories and functional units can be anything as long as they can perform the operations according to the embodiment of the present invention. The transmitting unit 110 and the receiving unit 120 may be called the communication unit.

[0111] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, information of a higher layer. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. The transmitting unit 110 also transmits setting information, etc., as described in the embodiment.

[0112] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20 in a storage device and reads it from the storage device as needed. The control unit 140 performs control of the entire base station 10, including control related to signal transmission and reception. The signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120. The transmission unit 110 and the reception unit 120 may also be called the transmitter and receiver, respectively.

[0113] <Terminal 20> Figure 15 shows an example of the functional configuration of terminal 20. As shown in Figure 15, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 15 is merely an example. The names of the functional categories and functional units can be anything as long as they can perform the operations according to the embodiment of the present invention. The transmitting unit 210 and the receiving unit 220 may be called the communication unit.

[0114] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains signals from higher layers from the received physical layer signals. The transmitting unit 210 also transmits a HARQ-ACK, and the receiving unit 220 receives the configuration information and the like as described in the embodiment.

[0115] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device and reads it from the storage device as needed. The setting unit 230 also stores pre-set setting information. The control unit 240 controls the entire terminal 20, including control related to signal transmission and reception. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220. The transmission unit 210 and the reception unit 220 may also be called the transmitter and receiver, respectively.

[0116] (Hardware configuration) The block diagrams (Figures 14 and 15) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the above one device or the above multiple devices with software.

[0117] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0118] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 16 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0119] In the following explanation, the term "device" can be read as "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0120] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0121] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0122] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 14 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 15 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0123] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0124] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0125] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0126] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0127] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0128] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0129] Figure 17 shows an example of the configuration of vehicle 2001. As shown in Figure 17, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0130] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0131] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0132] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0133] The Information Services Unit 2012 consists of various devices for providing various types of information, such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0134] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0135] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0136] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0137] The communication module 2013 transmits current signals from current sensors input to the electronic control unit 2010 to an external device via wireless communication. The communication module 2013 also transmits, via wireless communication, other signals input to the electronic control unit 2010, including front and rear wheel rotation speed signals obtained by the rotation speed sensor 2022, front and rear wheel air pressure signals obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression signals obtained by the accelerator pedal sensor 2029, brake pedal depression signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, and detection signals obtained by the object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0138] The communication module 2013 receives various information (traffic information, signal information, distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 installed in the vehicle 2001. The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., installed in the vehicle 2001.

[0139] (Summary of the embodiments) As described above, according to an embodiment of the present invention, a terminal is provided which has a control unit that determines which CSI (Channel State Information) report to transmit based on the order in which carrier switching is applied to the channel carrying uplink control information among the CSI (Channel State Information) reports of each of a plurality of cells, and determines the cell to which the determined CSI report will be transmitted, and a transmission unit that transmits the determined CSI report in the determined cell.

[0140] With the above configuration, when terminal 20 transmits multiple CSIs, it can determine which CSI report to transmit based on conditions related to PUCCH carrier switching, conditions related to CSI reporting, etc., and determine the cell to which the determined CSI report will be transmitted. In other words, the procedure for reporting CSI (Channel State Information) in a wireless communication system can be clarified.

[0141] The control unit may first determine which cell will transmit the CSI report by applying the carrier switching, and second determine which cell will transmit the CSI report. With this configuration, when the terminal 20 transmits multiple CSIs, it can determine which CSI report to transmit based on conditions related to PUCCH carrier switching, conditions related to CSI reporting, etc., and determine which cell will transmit the determined CSI report.

[0142] The control unit may first decide to multiplex and transmit at least a portion of each of the CSI reports for a certain period, and second decide which cell to transmit the multiplexed CSI reports by applying the carrier switching. With this configuration, when the terminal 20 transmits multiple CSIs, it can determine which CSI reports to transmit based on conditions related to PUCCH carrier switching, conditions related to CSI reports, etc., and determine which cell to transmit the determined CSI reports.

[0143] The control unit may determine a cell to transmit a CSI report from a cell that has a resource list set for the channel of uplink control information for transmitting a CSI report. With this configuration, when terminal 20 transmits multiple CSIs, it can determine which CSI report to transmit based on conditions related to PUCCH carrier switching, conditions related to CSI reporting, etc., and determine the cell to transmit the determined CSI report.

[0144] The control unit does not need to transmit the multiplexed CSI report if no CSI report exists in the determined cell. With this configuration, when the terminal 20 transmits multiple CSIs, it can determine which CSI report to transmit based on conditions related to PUCCH carrier switching, conditions related to CSI reporting, etc., and determine the cell to which the determined CSI report will be transmitted.

[0145] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a terminal performs a control procedure to determine which CSI report to transmit based on the order in which carrier switching is applied to the channel carrying uplink control information among the CSI (Channel State Information) reports of each of a plurality of cells, and to determine the cell to which the determined CSI report will be transmitted, and a transmission procedure to transmit the determined CSI report in the determined cell.

[0146] With the above configuration, when terminal 20 transmits multiple CSIs, it can determine which CSI report to transmit based on conditions related to PUCCH carrier switching, conditions related to CSI reporting, etc., and determine the cell to which the determined CSI report will be transmitted. In other words, the procedure for reporting CSI (Channel State Information) in a wireless communication system can be clarified.

[0147] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0148] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0149] Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0150] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0151] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0152] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0153] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0154] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0155] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0156] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0157] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0158] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0159] The terms “system” and “network” as used in this disclosure are interchangeable.

[0160] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0161] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0162] In this disclosure, terms such as "base station (BS)", "wireless base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0163] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0164] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0165] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0166] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0167] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything)). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0168] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0169] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0170] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0171] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0172] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0173] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0174] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0175] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0176] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0177] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0178] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0179] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0180] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0181] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0182] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0183] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0184] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0185] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0186] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0187] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0188] Furthermore, the time domain of RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0189] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0190] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0191] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology system in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. A Bandwidth Part (PRB) may be defined and numbered within a given BWP.

[0192] A BWP may include a BWP for UL (Ultraviolet Link) and a BWP for DL ​​(Download Link). One or more BWPs may be set for a terminal 20 within a single carrier.

[0193] At least one of the configured BWPs may be active, and terminal 20 does not need to be expected to send or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0194] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0195] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0196] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0197] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0198] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way.

[0199] This international patent application claims priority based on Japanese Patent Application No. 2021-170988, filed on 19 October 2021, and the entire contents of Japanese Patent Application No. 2021-170988 are incorporated herein by reference. [Explanation of symbols]

[0200] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 30 Core Network 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A control unit that determines a first cell to which a CSI (Channel State Information) report is to be sent, based on a carrier switching cell timing pattern applied to a PUCCH (Physical Uplink Control Channel) for reporting a CSI (Channel State Information) report, The first cell includes a transmission unit that transmits the CSI report, The control unit is configured in the second cell to send the CSI report, and if the first cell and the second cell are different, the control unit does not send the PUCCH in the second cell.

2. A step of determining a first cell to which the CSI report will be sent, based on a carrier switching cell timing pattern applied to a PUCCH (Physical Uplink Control Channel) for reporting the CSI (Channel State Information), The steps include transmitting the CSI report in the first cell, A communication method performed by a terminal, comprising the steps of: setting a PUCCH for reporting the CSI in a second cell, and not transmitting a PUCCH in the second cell if the first cell and the second cell are different.

3. A control unit that instructs a terminal to determine a first cell to which the CSI report will be sent, based on a carrier switching cell timing pattern applied to a PUCCH (Physical Uplink Control Channel) for reporting the CSI (Channel State Information), The first cell includes a receiving unit that receives the CSI report, The control unit sets a PUCCH in the second cell for reporting the CSI, and assumes that if the first cell and the second cell are different, the PUCCH will not be transmitted in the second cell, this is a base station.

4. A wireless communication system including a terminal and a base station, The aforementioned base station is A control unit that instructs the terminal to determine a first cell to which the CSI (Channel State Information) report will be sent, based on a carrier switching cell timing pattern applied to a PUCCH (Physical Uplink Control Channel) for reporting the CSI (Channel State Information) report, The first cell includes a receiving unit that receives the CSI report, The control unit sets a PUCCH in the second cell for sending the CSI report, and assumes that if the first cell and the second cell are different, the PUCCH will not be sent in the second cell. The aforementioned terminal is A control unit that determines the first cell to which the CSI report will be sent based on the cell timing pattern, The first cell includes a transmission unit that transmits the CSI report, The control unit is a wireless communication system in which, if the first cell and the second cell are different, the second cell does not transmit a PUCCH.

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